CBSE  /  Class 11  /  Chemistry  /  Some Basic Concepts of Chemistry

  • 1. 
    Approximate atomic weight of an element is 26. 89. If its equivalent weight is 8. 9, the exact atomic weight of element would be

  • 26. 89
  • 8. 9
  • 17. 8
  • 26. 7

  • 2. 
    The number of moles present in 6 gms of carbon is:

  • 2
  • 0. 5
  • 5
  • 1

  • 3. 
    What is the concentration of nitrate ions if equal volumes of 0. 1 M AgNO

  • 0. 1 N
  • 0. 2 M
  • 0. 05 M
  • 0. 25 M

  • 4. 
    The -ve charged particles is called:

  • Anion
  • Cation
  • Radical
  • Atom

  • 5. 
    Which is not a unit of pressure:

  • Bar
  • N/m²
  • Kg/m²
  • Torr

  • 6. 
    What is the normality of a 1 M solution of H

  • 0. 5 N
  • 1. 0 N
  • 2. 0 N
  • 3. 0 N

  • 7. 
    The total number of ions present in 111 g of CaCl

  • One Mole
  • Two Mole
  • Three Mole
  • Four Mole

  • 8. 
    Which of the following weighs the most?

  • One g – atom of nitrogen
  • One mole of water
  • One mole of sodium
  • One molecule of H

  • 9. 
    Under similar conditions of pressure and temperature, 40 ml of slightly moist hydrogen chloride gas is mixed with 20 ml of ammonia gas, the final volume of gas at the same temperature and pressure will be

  • 100 ml
  • 20 ml
  • 40 ml
  • 60 ml

  • 10. 
    An organic compound contains carbon , hydrogen and oxygen. Its elemental analysis gave C, 38. 71% and H, 9. 67%. The empirical formula of the compound would be

  • CHO
  • CH
  • CH
  • CH
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